how to set the controller/action route in sencha architect or extjs mvc?

how to set the controller/action route in sencha architect or extjs mvc?

I have two controllers: 'ControllerA', ''ControllerB'', when 'CtronllerA' is Initialized, view 'WindowA' is showed, when 'CtronllerB' is Initialized, view 'WindowB' is showed. There is a button 'B1' on window 'WindowA', click this button, I want to show 'windowB'. In asp.net MVC we can use controller/action,
In Sencha Architect, What can I do? how do i set the controller route ?